Rear-View Mirror Optical Assembly for Directional Surface Light
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Solution Overview
Problem
Existing light emitting diodes (LEDs) used in vehicle lamps emit light in various directions, leading to ineffective visual information provision for drivers and potential obstruction of the driver's view in other vehicles, necessitating a solution to direct and control the light emission effectively.
Innovation Solution
An optical assembly with a light source module and an aspherical reflective surface that reflects surface light in a set direction, utilizing a housing with a recessed reflective portion and a transparent cover to control light emission, minimizing light loss and interference with other vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a light emitting diode is used as a vehicle lamp, then power consumption is reduced, but the light emitting area is insufficient due to the small size of the LED
Solution Approach 1:
The patent transitions from point-source LED emission to surface light emission by disposing the LED on the bottom surface of a light guide plate, enabling light to propagate through the plate and emit from its side surfaces, effectively expanding the light emitting area in a dimensional transformation
2Area of stationary object
If light is emitted in various directions from the light emitting diode, then the light emitting area increases, but visual information is not effectively provided to the driver and may obstruct the view of other drivers
Solution Approach 1:
The patent applies local quality by using a reflective portion with specific reflectivity characteristics in certain regions to redirect light toward the driver while preventing light from entering other vehicles, creating spatially differentiated light distribution with high effectiveness for the driver and low interference for others
Solution Approach 2:
The patent controls light direction by managing light propagation through the light guide plate structure, where light enters from the bottom surface and exits from side surfaces, transforming the light emission pattern from omnidirectional point source to directional surface emitter
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The optical assembly enhances luminous intensity and light uniformity, allowing controlled luminance distribution to prevent interference with rear vehicles while maximizing light emission for the driver, improving the reliability of alarm systems.
Implementation Method 1
an aspherical reflective surface that reflects the surface light in a set direction
Data Source
AI summary
The optical assembly disclosed in the embodiment of the invention includes: a lighting module having a resin layer and a light emitting device inside the resin layer, and having an exit surface for emitting surface light to one side; a reflective portion having a recess in a lower portion of the exit side of the lighting module and an aspherical curved surface at the bottom of the recess; and a transparent cover on the recess to reflect the surface light to a set region.